Travis: move "nsp" to "script" section
Travis: move "nsp" to "script" section

As Jeremie suggested: https://github.com/w3c/echidna/pull/210#discussion_r35340426

dontcallmedom/specberus,dontcallmedom/specberus,w3c/specberus,w3c/specberus,w3c/specberus